(19)
(11) EP 2 347 905 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.05.2012 Bulletin 2012/18

(43) Date of publication A2:
27.07.2011 Bulletin 2011/30

(21) Application number: 11150263.9

(22) Date of filing: 05.01.2011
(51) International Patent Classification (IPC): 
B41J 2/175(2006.01)
 B41J 2/185(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 22.01.2010 JP 2010012227

(71) Applicant: Ricoh Company Ltd.
Tokyo 143-8555 (JP)

(72) Inventor:
  • Tsubaki, Kengo
    Miyagi 989-1695 (JP)

(74) Representative: Leeming, John Gerard 
J A Kemp 14 South Square Gray's Inn
London WC1R 5JJ
London WC1R 5JJ (GB)

   


(54) Liquid jetting head unit and image forming apparatus


(57) In a liquid jetting head unit, a tank case in a head tank includes a first connection path connecting a downstream chamber of the tank case and a discharge path, and a second connection path connecting an upstream chamber of the tank case and the discharge path. The discharge path includes a filter member provided between a first part of the discharge path connected to the first connection path and a second part of the discharge path connected to the second connection path.







Search report